* {
    border: none;
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
}
body {

}
.center {
    height: auto;
    margin: auto;
    width: 100%;
}
h1 {
    color: #495678;
    font-size: 30px;
    margin-top: 20px;
    padding-top: 50px;
    display: block;
    text-align: center;
    text-decoration: none;
}
a {
    color: #495678;
    font-size: 30px;
    display: block;
    text-align: center;
    text-decoration: none;
    padding-top: 20px;
}
form {
    background-color: #495678;
    box-shadow: 4px 4px #3d4a65;
    margin: 10px auto;
    padding: 30px 0px;
    width: 100%;
}
.btn {
    outline: none;
    cursor: pointer;
    font-size: 20px;
    height: 45px;
    margin: 5px 0 5px 2%;
    width: 17%;
}
/*.btn:first-child {*/
    /*margin: 5px 0 5px 5px;*/
/*}*/
.btn, #display, form {
    border-radius: 25px;
}
#display {
    outline: none;
    background-color: #98d1dc;
    box-shadow: inset 6px 6px 0px #3facc0;
    color: #dededc;
    font-size: 20px;
    height: 47px;
    text-align: right;
    width: 76%;
    padding-right: auto;
    margin-left: 2%;
}
.num {
    background-color: #72778b;
    box-shadow: 0 5px #5f6680;
    color: #dededc;
}
.num:active {
    box-shadow: 0 2px #5f6680;
    -webkit-transform: translateY(2px);
    -ms-transform: translateY(2px);
    -moz-tranform: translateY(2px);
    transform: translateY(2px);
}
.operator {
    background-color: #dededc;
    box-shadow: 0 5px #bebebe;
    color: #72778b;
}
.operator:active {
    box-shadow: 0 2px #bebebe;
    -webkit-transform: translateY(2px);
    -ms-transform: translateY(2px);
    -moz-tranform: translateY(2px);
    transform: translateY(2px);
}
.other {
    background-color: #e3844c;
    box-shadow: 0 5px #e76a3d;
    color: #dededc;
}
.channel {
    background-color: #e3844c;
    box-shadow: 0 5px #e76a3d;
    color: #dededc;
    width: 36%;
    padding-right: auto;
    margin-left: 2%;
}
.other:active {
    box-shadow: 0 2px #e76a3d;
    -webkit-transform: translateY(2px);
    -ms-transform: translateY(2px);
    -moz-tranform: translateY(2px);
    transform: translateY(2px);
}